Non-ladder Extended Renormalization Group Analysis of the Dynamical Chiral Symmetry Breaking

Details Non-ladder Extended Renormalization Group Analysis of the Dynamical Chiral Symmetry Breaking Non-ladder Extended Renormalization Group Analysis of the Dynamical Chiral Symmetry Breaking

2000-02-05

arxiv.org/abs/hep-th/0002038v2

Prog.Theor.Phys. 103 (2000) 815-832

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, 30 eps file, 15 figures, LaTeX, slightly revised, references corrected, To be published in Prog. Theo. Phys

Scientific paper

10.1143/PTP.103.815

The order parameters of dynamical chiral symmetry breaking in QCD, the dynamical mass of quarks and the chiral condensates, are evaluated by numerically solving the Non-Perturbative Renormalization Group (NPRG) equations. We employ an approximation scheme beyond ``the ladder'', that is, beyond the (improved) ladder Schwinger-Dyson equations. The chiral condensates are enhanced compared with the ladder ones, which is phenomenologically favorable. The gauge dependence of the order parameters is fairly reduced in this scheme.

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